Which of the following statements about the silver halides are correct?

AAgCl dissolves in dilute ammonia as $[Ag (NH X_{3}) X_{2}] X^{+}$ .
BAgBr dissolves readily in dilute ammonia to give a clear solution.
CAgI does not dissolve in conc. ammonia.
DAgCl, AgBr and AgI all dissolve in excess sodium thiosulphate solution through $[Ag (S X_{2} O X_{3}) X_{2}] X^{3 -}$ .

Answer: A, C, D

AgCl is soluble in dilute ammonia; AgBr only in conc. ammonia, so statement 2 is false. AgI has a very small

K_{s p}

and is insoluble in ammonia. All three dissolve in thiosulphate by forming

[Ag (S X_{2} O X_{3}) X_{2}] X^{3 -}

, which is a much stronger complex.